1/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "Benchmark.h"
9#include "SkBlurImageFilter.h"
10#include "SkDisplacementMapEffect.h"
11#include "SkCanvas.h"
12#include "SkMergeImageFilter.h"
13
14enum { kNumInputs = 5 };
15
16// Exercise a blur filter connected to 5 inputs of the same merge filter.
17// This bench shows an improvement in performance once cacheing of re-used
18// nodes is implemented, since the DAG is no longer flattened to a tree.
19
20class ImageFilterDAGBench : public Benchmark {
21public:
22    ImageFilterDAGBench() {}
23
24protected:
25    const char* onGetName() override {
26        return "image_filter_dag";
27    }
28
29    void onDraw(int loops, SkCanvas* canvas) override {
30        for (int j = 0; j < loops; j++) {
31            SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(20.0f, 20.0f));
32            SkImageFilter* inputs[kNumInputs];
33            for (int i = 0; i < kNumInputs; ++i) {
34                inputs[i] = blur.get();
35            }
36            SkAutoTUnref<SkImageFilter> merge(SkMergeImageFilter::Create(inputs, kNumInputs));
37            SkPaint paint;
38            paint.setImageFilter(merge);
39            SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
40            canvas->drawRect(rect, paint);
41        }
42    }
43
44private:
45    typedef Benchmark INHERITED;
46};
47
48// Exercise a blur filter connected to both inputs of an SkDisplacementMapEffect.
49
50class ImageFilterDisplacedBlur : public Benchmark {
51public:
52    ImageFilterDisplacedBlur() {}
53
54protected:
55    const char* onGetName() override {
56        return "image_filter_displaced_blur";
57    }
58
59    void onDraw(int loops, SkCanvas* canvas) override {
60        for (int j = 0; j < loops; j++) {
61            SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(4.0f, 4.0f));
62            SkDisplacementMapEffect::ChannelSelectorType xSelector = SkDisplacementMapEffect::kR_ChannelSelectorType;
63            SkDisplacementMapEffect::ChannelSelectorType ySelector = SkDisplacementMapEffect::kB_ChannelSelectorType;
64            SkScalar scale = 2;
65            SkAutoTUnref<SkImageFilter> displ(SkDisplacementMapEffect::Create(xSelector, ySelector, scale,
66                                                                              blur.get(), blur.get()));
67            SkPaint paint;
68            paint.setImageFilter(displ);
69            SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
70            canvas->drawRect(rect, paint);
71        }
72    }
73
74private:
75    typedef Benchmark INHERITED;
76};
77
78DEF_BENCH(return new ImageFilterDAGBench;)
79DEF_BENCH(return new ImageFilterDisplacedBlur;)
80